1277404846728 has 32 divisors (see below), whose sum is σ = 3193852308000. Its totient is φ = 425756256768.

The previous prime is 1277404846661. The next prime is 1277404846747. The reversal of 1277404846728 is 8276484047721.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2604553 + ... + 3055896.

It is an arithmetic number, because the mean of its divisors is an integer number (99807884625).

Almost surely, 2^{1277404846728} is an apocalyptic number.

It is an amenable number.

1277404846728 is an abundant number, since it is smaller than the sum of its proper divisors (1916447461272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1277404846728 is a wasteful number, since it uses less digits than its factorization.

1277404846728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5669861 (or 5669857 counting only the distinct ones).

The product of its (nonzero) digits is 33718272, while the sum is 60.

The spelling of 1277404846728 in words is "one trillion, two hundred seventy-seven billion, four hundred four million, eight hundred forty-six thousand, seven hundred twenty-eight".